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SIERRA 2121 30CAL 125 GR. HP MATCH 100 CT.
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
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SKU: 2121-092763021217
Overview
Built for reloading the .300 AAC Blackout and other .30 caliber AR chamberings, this 125 grain hollow point MatchKing bullet is aimed at shooters who prioritize accuracy and consistency on the range. It also suits bolt action rifles chambered in compatible .30 caliber cartridges, giving handloaders a versatile option for precision-focused setups. The flat-based design and jacket are described for use across common midlevel .30 caliber velocities, but the product information notes it is not recommended for most hunting applications. For load development, the manufacturer directs users to consult a reloading manual or powder manufacturer data.
Why Hunters Choose the Sierra Bullets
.300 Aac
Blackout cartridge in AR-platform rifles
Also Proven
Accurate in bolt-action rifles and
125 Grain
.30 caliber HP MatchKing flat-based
Jacket Intended
To handle velocities from common
Suitable Load
Published reloading manual or powder
Key Features
- 30 caliber, 125 grain HP MatchKing bullet
- Flat-based design developed with AAC and Remington Arms
- Designed for the .300 AAC Blackout cartridge on the AR platform
- Also proven accurate in bolt action rifles and other .30 caliber AR chamberings
- Jacket designed for velocities common to midlevel .30 caliber cartridges
- 100-count box
Best Used For
- .300 AAC Blackout AR-platform shooters building loads around the 125 grain HP MatchKing design
- Bolt-action rifle users seeking a flat-based .30 caliber match bullet for accuracy-focused shooting
- Reloaders working with common .30 caliber midlevel cartridges and published load data
- Varmint hunters who understand MatchKing bullets are not intended for reliable explosive expansion
- Serious shooters prioritizing target use over general hunting applications
Specifications
| Bullet Base | flat based |
|---|---|
| Bullet Type | HP MatchKing |
| Bullet Weight | 125 grain |
| Caliber | 30 caliber |
| Compatible Firearms | bolt action rifles and other .30 caliber AR chamberings |
| Designed For | .300 AAC Blackout cartridge |
| Hunting Recommendation | not recommended for most hunting applications |
| Jacket Design | specifically designed to handle velocities ranging up through common .30 caliber midlevel cartridges |
| Load Data Note | check your reloading manual or powder manufacturer's website for load data |
| Platform | AR platform |
| Quantity | 100 ct. |
| Varmint Use Note | commonly used for varmint hunting, but not designed to provide the same reliable explosive expansion as lightly jacketed Hornet, Blitz or Varminter counterparts |
Pros
- Designed for the .300 AAC Blackout cartridge in AR-platform rifles.
- Also proven accurate in bolt-action rifles and other .30 caliber AR chamberings.
- 125 grain .30 caliber HP MatchKing flat-based bullet design.
- Jacket intended to handle velocities from common .30 caliber midlevel cartridges.
- Suitable for load development with published reloading manual or powder manufacturer data.
Considerations & Trade-offs
- Designed for the .300 AAC Blackout and AR-platform use, so it is not a general-purpose .30 caliber bullet for every rifle or load.
- The MatchKing design is not recommended for most hunting applications, so it is better suited to precision/target use than broad big-game use.
- Even where it is used for varmints, the description notes it will not deliver the same reliable explosive expansion as lightly jacketed varmint bullets.
- Load data is not provided here; the product directs users to a reloading manual or powder manufacturer website before use.
Suggested Comparisons
- .300 AAC Blackout bullets
- .30 caliber match bullets
- Varmint bullets
- AR-platform reloading components
Suggested Accessories
- Bullet storage box
- Reloading manual
- Powder scale
- Bullet puller
Frequently Asked Questions
What cartridge was this 125 grain .30 caliber MatchKing designed around?
It was designed in conjunction with AAC and Remington Arms for the .300 AAC Blackout cartridge for the AR platform.
Can this bullet be used in bolt-action rifles?
The product description says it has also proven to be exceptionally accurate in bolt-action rifles and other .30 caliber AR chamberings.
Is this bullet recommended for hunting?
The description says MatchKing and Tipped MatchKing bullets are not recommended for most hunting applications.
What does the description say about use on varmints?
It says these bullets are commonly used for varmint hunting, but they do not provide the same reliable explosive expansion at equivalent velocities as lightly jacketed Hornet, Blitz, or Varminter bullets.
Where can I find load data for this bullet?
The description advises checking your reloading manual or a powder manufacturer’s website for load data.